Taiwan · Grade 2 · Practice Sheet 22

1. 1.

   How many tens are there in the number 39?

   Formula:Place Value

   $\text{value} = \text{tens} \times 10 + \text{ones}$

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2. 2.

   Add 18 + 19 + 2.

   Formula:Addition of Three Numbers

   $\text{sum} = a + b + c$

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3. 3.

   What is half of 40?

   Formula:Halving

   $h = n \div 2$

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4. 4.

   What is double 14?

   Formula:Doubling

   $d = 2 \times n$

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5. 5.

   What is half of 44?

   Formula:Halving

   $h = n \div 2$

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6. 6.

   Add 28 and 29.

   Formula:Addition

   $\text{sum} = a + b$

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7. 7.

   You have NT$ 2 and NT$ 1. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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8. 8.

   Subtract 37 from 42.

   Formula:Subtraction

   $\text{difference} = a - b$

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9. 9.

   There are 6 bags with 5 apples in each bag. How many apples are there in total?

   Formula:Multiplication as Repeated Addition

   $\text{total} = \text{groups} \times \text{size}$

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10. 10.

    What is double 24?

    Formula:Doubling

    $d = 2 \times n$

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11. 11.

    How many tens are there in the number 17?

    Formula:Place Value

    $\text{value} = \text{tens} \times 10 + \text{ones}$

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12. 12.

    You have NT$ 1 and NT$ 7. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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13. 13.

    Fill in the missing number: 15 + ___ = 17.

    Formula:Missing Addend

    $b = \text{total} - a$

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14. 14.

    What is 7 − 3?

    Formula:Subtraction

    $\text{difference} = a - b$

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15. 15.

    What is double 3?

    Formula:Doubling

    $d = 2 \times n$

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16. 16.

    What is 7 × 8?

    Formula:Multiplication (Times Tables)

    $\text{product} = a \times b$

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17. 17.

    Add 20 and 57.

    Formula:Addition

    $\text{sum} = a + b$

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18. 18.

    What is 18 − 7?

    Formula:Subtraction

    $\text{difference} = a - b$

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19. 19.

    Fill in the missing number: 2 + ___ = 10.

    Formula:Missing Addend

    $b = \text{total} - a$

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20. 20.

    What is 9 × 3?

    Formula:Multiplication (Times Tables)

    $\text{product} = a \times b$

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